// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()

// 云函数入口函数
exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()
  let {OPENID}=cloud.getWXContext()
  const _ = cloud.database().command
  var a=-event.reduceCredit
  var b=event.addlottery
  return cloud.database().collection("client")
  .where({openid:OPENID})
  .update({
    data:{
      credit: _.inc(a),
      lotteryTimes: _.inc(b)
    }
  })
}